CN220793285U - Heat exchanger and air conditioner - Google Patents

Abstract

The application relates to the technical field of household appliances, and discloses a heat exchanger, which comprises a first refrigerant inlet and outlet, a second refrigerant inlet and outlet, a first heat exchange tube group, a second heat exchange tube group, a third pipeline and a fourth pipeline, wherein one end of the first heat exchange tube group is connected with the first pipeline through a first flow divider, and a first valve is arranged on the first pipeline; one end of the second heat exchange tube group is connected with the other end of the first heat exchange tube group through a converging pipeline, and the other end of the second heat exchange tube group is connected with a second pipeline through a second flow divider; the third pipeline is communicated with the first flow divider and the second flow divider, and a second valve is arranged on the third pipeline; one end of the fourth pipeline is connected with the converging pipeline and is provided with a third valve. According to the application, the reverse cross flow can be formed under the refrigeration and heating conditions, so that the utilization rate of the heat exchanger is improved, the energy efficiency of the heat exchanger is improved, the heat exchange quantity can be obviously improved, and the optimal utilization of the heat exchanger is realized. The application also discloses an air conditioner.

Description

Heat exchanger and air conditioner

Technical Field

The application relates to the technical field of household appliances, in particular to a heat exchanger and an air conditioner.

Background

An air conditioner is a commonly used air temperature conditioning apparatus. The existing air conditioner mainly has a split structure, namely an indoor unit and an outdoor unit, and the indoor unit and the outdoor unit are connected through a refrigerant circulation loop. The indoor unit comprises an indoor heat exchanger, and the outdoor unit comprises an outdoor heat exchanger. Because the indoor heat exchanger and the outdoor heat exchanger are key components of the air conditioner for indoor and outdoor heat exchange, the heat exchange efficiency of the indoor heat exchanger and the outdoor heat exchanger directly influences the refrigerating or heating effect of the air conditioner.

Currently, in order to improve the heat exchange efficiency of an air conditioner, the existing air conditioner is provided with a variable flow-dividing heat exchanger, and when in refrigeration, the flow path of a refrigerant is opposite to the air flow direction; when heating, the flow path of the refrigerant is the same as the air flow direction, so that the heat exchange process is completed, but the heat exchange is performed by adopting the mode, the utilization rate of the heat exchanger is low, the energy efficiency of the heat exchanger is still not beneficial to improvement, and the optimal utilization of the heat exchanger cannot be realized.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

The utilization rate of the heat exchanger is low, the energy efficiency of the heat exchanger is still not beneficial to improvement, and the optimal utilization of the heat exchanger cannot be realized.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the application and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art.

Disclosure of utility model

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.

The embodiment of the disclosure provides a heat exchanger and an air conditioner, through the cooperation of a fourth pipeline and a plurality of valves, a refrigerant flow path can be optimized, and reverse cross flow can be formed under refrigeration and heating conditions, so that the utilization rate of the heat exchanger is improved, the energy efficiency of the heat exchanger is improved, the heat exchange amount can be obviously improved, and the optimal utilization of the heat exchanger is realized.

In some embodiments, the heat exchanger comprises a first refrigerant inlet and outlet, a second refrigerant inlet and outlet, a first heat exchange tube group, a second heat exchange tube group, a third pipeline and a fourth pipeline, wherein the first refrigerant inlet and outlet is connected with the first pipeline, the second refrigerant inlet and outlet is connected with the second pipeline, one end of the first heat exchange tube group is connected with the first pipeline through a first flow divider, and a first valve is arranged on the first pipeline; one end of the second heat exchange tube group is connected with the other end of the first heat exchange tube group through a converging pipeline, and the other end of the second heat exchange tube group is connected with a second pipeline through a second flow divider; the third pipeline is communicated with the first flow divider and the second flow divider, and a second valve is arranged on the third pipeline; one end of the fourth pipeline is connected with the converging pipeline, the other end of the fourth pipeline is connected with the first refrigerant inlet and outlet, and a third valve is arranged on the fourth pipeline.

Optionally, in the case of the refrigeration mode of operation, the first valve is in a conducting state, and the second valve and the third valve are both in a blocking state; under the condition of running the heating mode, the second valve and the third valve are both in a conducting state, and the first valve is in a blocking state.

Optionally, the first valve, the second valve and the third valve are all check valves or solenoid valves.

Optionally, the first pipeline and the second pipeline are connected with the third pipeline, wherein a first connection point is formed at the position where the first pipeline is connected with the third pipeline, a second connection point is formed at the position where the second pipeline is connected with the third pipeline, and the second valve is located between the first connection point and the second connection point.

Optionally, the first heat exchange tube group is communicated with the first flow divider through a first branch tube, the second heat exchange tube group is communicated with the second flow divider through a second branch tube, and the first branch tube and the second branch tube are all provided with a plurality of branches, wherein a plurality of first branch tubes and a plurality of second branch tubes are all provided with a liquid inlet tube and a liquid outlet tube, the liquid inlet tube and the liquid outlet tube of the first branch tubes are connected at two ends of the first heat exchange tube group, and the liquid inlet tube and the liquid outlet tube of the second branch tubes are connected at two ends of the second heat exchange tube group.

Optionally, the number of the first branch pipes is greater than the number of the second branch pipes.

Optionally, the collecting pipeline comprises a first collecting pipe and a second collecting pipe, one end of the first collecting pipe is connected with the first heat exchange pipe group, and the other end of the first collecting pipe is connected with the fourth pipeline; one end of the second collecting pipe is connected with the first collecting pipe, and the other end is connected with the second heat exchange pipe group.

Optionally, one end of the second collecting pipe is connected with the first collecting pipe through a connecting pipeline, the connecting pipeline comprises a first main flow pipe, a second main flow pipe, a first branch pipe and a second branch pipe, one end of the first main flow pipe is connected with the first collecting pipe, one end of the second main flow pipe is connected with the second collecting pipe, the other end of the first main flow pipe is connected with one ends of the first branch pipe and the second branch pipe through a three-way valve, the other ends of the first branch pipe and the second branch pipe are connected with the other ends of the second main flow pipe, a one-way valve is arranged on the first branch pipe, and the one-way valve is configured to be conducted from the second main flow pipe to the direction of the first main flow pipe.

Optionally, the heat exchanger further comprises: a controller assembly. The controller component is connected with the first valve, the second valve and the third valve and used for controlling the on-off of the first valve, the second valve and the third valve.

In some embodiments, an air conditioner comprises a heat exchanger as described in any one of the above.

The heat exchanger and the air conditioner provided by the embodiment of the disclosure can realize the following technical effects:

In the process of heat exchange, the installation position of the fan and the installation position of the heat exchanger are fixed, so that the air outlet mode of the fan is directional air outlet, and the flow path of the heat exchanger is reversed when the refrigerating and heating working conditions are switched, so that the traditional heat exchanger has a working condition in a downstream cross flow state in the refrigerating or heating stage, namely the flow direction of the internal refrigerant is the same as the flow direction of the air flow, and the embodiment can control the first valve to be conducted and the second valve to be blocked by the third valve when the refrigerating working condition is operated, so that the refrigerant entering from the first refrigerant inlet and outlet sequentially flows through the first heat exchange group and the second heat exchange group to exchange heat, and then sequentially flows to the second refrigerant inlet and outlet through the third pipeline and the second pipeline after heat exchange, and most of flow paths of the refrigerant and the air flow direction form reverse cross flow; when the heating working condition is operated, the refrigerant enters from the second refrigerant inlet and outlet and flows into the third pipeline through the second pipeline, then the refrigerant is divided into a plurality of paths and synchronously flows to the first heat exchange group and the second heat exchange group for heat exchange, the refrigerant after heat exchange intensively flows into the converging pipeline and flows to the first refrigerant inlet and outlet through the fourth pipeline to finish heat exchange, and at the moment, the flow direction of the refrigerant is opposite to the flow direction of air, and reverse cross flow is formed, so that the refrigerant flow can be optimized through the cooperation of the fourth pipeline and a plurality of valves, the reverse cross flow can be formed under the refrigerating and heating working conditions, the utilization rate of the heat exchanger is improved, the energy efficiency of the heat exchanger is improved, the heat exchange quantity is obviously improved, and the optimal utilization of the heat exchanger is realized.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:

FIG. 1 is a schematic view of a heat exchanger provided in an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of a refrigeration flow path provided by an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of a heating flow path provided by an embodiment of the present disclosure;

FIG. 4 is a schematic view of another heat exchanger provided by an embodiment of the present disclosure;

FIG. 5 is a schematic view of another heat exchanger provided by an embodiment of the present disclosure;

fig. 6 is a schematic structural view of an air conditioner provided in an embodiment of the present disclosure.

Reference numerals:

100. A first pipeline; 101. a first refrigerant inlet and outlet; 102. a first valve; 200. a second pipeline; 201. a second refrigerant inlet and outlet; 300. a first heat exchange tube group; 301. a first shunt; 302. a first branch pipe; 400. a second heat exchange tube group; 401. a second splitter; 402. a second branch pipe; 500. a confluence pipeline; 501. a first manifold; 502. a second manifold; 503. a connecting pipeline; 504. a first main flow pipe; 505. a second main flow pipe; 506. a first branch pipe; 507. a second branch pipe; 600. a third pipeline; 601. a second valve; 700. a fourth pipeline; 701. a third valve; 800. a controller assembly; 900. a blower.

Detailed Description

So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.

The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are used primarily to better describe embodiments of the present disclosure and embodiments thereof and are not intended to limit the indicated device, element, or component to a particular orientation or to be constructed and operated in a particular orientation. Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the embodiments of the present disclosure will be understood by those of ordinary skill in the art in view of the specific circumstances.

In addition, the terms "disposed," "connected," "secured" and "affixed" are to be construed broadly. For example, "connected" may be in a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the embodiments of the present disclosure may be understood by those of ordinary skill in the art according to specific circumstances.

The term "plurality" means two or more, unless otherwise indicated.

In the embodiment of the present disclosure, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B.

The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.

It should be noted that, without conflict, the embodiments of the present disclosure and features of the embodiments may be combined with each other.

Referring to fig. 1-3, an embodiment of the present disclosure provides a heat exchanger, including a first refrigerant inlet and outlet 101, a second refrigerant inlet and outlet 201, a first heat exchange tube set 300, a second heat exchange tube set 400, a third tube 600 and a fourth tube 700, where the first refrigerant inlet and outlet 101 is connected with a first tube 100, the second refrigerant inlet and outlet 201 is connected with a second tube 200, one end of the first heat exchange tube set 300 is connected with the first tube 100 through a first diverter 301, and the first tube 100 is provided with a first valve 102; one end of the second heat exchange tube group 400 is connected to the other end of the first heat exchange tube group 300 through a confluence pipe 500, and the other end of the second heat exchange tube group 400 is connected to the second pipe 200 through a second flow splitter 401; a third pipeline 600, which is communicated with the first splitter 301 and the second splitter 401, and a second valve 601 is arranged on the third pipeline 600; one end of the fourth pipe 700 is connected to the confluence pipe 500, the other end is connected to the first refrigerant inlet/outlet 101, and a third valve 701 is provided thereon.

In the heat exchanger provided by the embodiment of the present disclosure, during the heat exchange, the installation position of the fan and the installation position of the heat exchanger are fixed, so that the air outlet form of the fan is directional air outlet, and the flow path of the heat exchanger is reversed during the cooling and heating working conditions switching, so that in the cooling or heating stage, one working condition of the conventional heat exchanger is necessarily in a downstream cross flow, that is, the flow direction of the internal refrigerant is the same as the flow direction of the air flow, while in the operation refrigeration working condition, the embodiment can control the first valve 102 to be switched on, and control the second valve 601 and the third valve 701 to block, so that the refrigerant entering from the first refrigerant inlet and outlet 101 sequentially flows through the first heat exchange group 300 and the second heat exchange group 400 for heat exchange, and then sequentially flows through the third pipeline 600 and the second pipeline 200 to the second refrigerant inlet and outlet 201, and most of the flow paths of the refrigerant form a reverse cross flow with the flow direction of the air after heat exchange; during the operation of heating, the refrigerant enters from the second refrigerant inlet and outlet 201 and flows into the third pipeline 600 through the second pipeline 200, then the refrigerant is divided into multiple paths to synchronously flow to the first heat exchange group 300 and the second heat exchange group 400 for heat exchange, the heat exchanged refrigerant intensively flows into the converging pipeline 500 and flows to the first refrigerant inlet and outlet 101 through the fourth pipeline 700 to finish heat exchange, and at the moment, the flow direction of the refrigerant is opposite to the flow direction of the air, and the reverse cross flow is formed, so that the refrigerant flow can be optimized through the cooperation of the fourth pipeline 700 and a plurality of valves, the reverse cross flow can be formed under the refrigeration and heating working conditions, the utilization rate of the heat exchanger is improved, the energy efficiency of the heat exchanger is improved, the heat exchange quantity is obviously improved, and the optimal utilization of the heat exchanger is realized.

It should be noted that, because the flow paths of the refrigerants are different during the operation of refrigeration and heating, under the condition of the operation of refrigeration, the refrigerants enter from the first refrigerant inlet and outlet 101 and flow out from the second refrigerant inlet and outlet 201, at this time, the first refrigerant inlet and outlet 101 is the inlet of the refrigerant, and the second refrigerant inlet and outlet 201 is the outlet of the refrigerant; under the condition of operating heating working conditions, the refrigerant enters from the second refrigerant inlet and outlet 201, and flows out from the first refrigerant inlet and outlet 101, at this time, the second refrigerant inlet and outlet 201 is the inlet of the refrigerant, and the first refrigerant inlet and outlet 101 is the outlet of the refrigerant; the forward and reverse cross flows are the same as the flow direction of the air in the flow path of the refrigerant during heat exchange, and the reverse cross flow is the flow direction of the air in the flow path of the refrigerant during heat exchange.

Alternatively, the first valve 102 and the third valve 701 are each disposed at a position near the first refrigerant inlet/outlet 101. In this way, when one of the first pipeline 100 and the fourth pipeline 700 is in the blocking state, a small amount of refrigerant is prevented from entering the first pipeline 100 or the fourth pipeline 700 in the blocking state, so that the amount of refrigerant in the circulation pipeline is reduced, the heat exchange effect is affected, and all the refrigerant is ensured to enter the circulation pipeline from the first pipeline 100 or the fourth pipeline 700 in the conducting state, thereby improving the heat exchange effect and efficiency.

In other embodiments, the first valve 102 and the third valve 701 are optionally two inlets and outlets of the first three-way valve, respectively, and the other inlet and outlet of the first three-way valve is in communication with the first refrigerant inlet and outlet 101. In this way, the first refrigerant inlet and outlet 101 can be connected with the first pipeline 100 and the fourth pipeline 700 through the first three-way valve, and then the conduction mode of the first three-way valve adjusting pipeline is controlled according to the running condition, so that the purpose of controlling the flow direction of the refrigerant can be achieved, the installation structure and the installation mode between the pipelines are simple, the space occupation is reduced while the installation is convenient, and the cost is reduced.

Optionally, in the case of the refrigeration mode of operation, the first valve 102 is in a conducting state, and the second valve 601 and the third valve 701 are both in a blocking state; in the case of operating the heating mode, both the second valve 601 and the third valve 701 are in a conducting state, and the first valve 102 is in a blocking state. Therefore, under the working condition of running refrigeration or heating, the flow direction of the refrigerant can be changed by controlling the on-off states of the three valves, so that the aim of optimizing the flow is fulfilled, the refrigeration and heating can be both performed in a reverse cross flow mode, the heat exchange quantity is further improved, and the aims of saving energy and reducing consumption are fulfilled while the heat exchange efficiency is effectively improved.

Optionally, the first valve 102, the second valve 601 and the third valve 701 are all one-way valves or solenoid valves. Like this, the check valve can make fluid flow along a direction all the time, and can't take place reverse flow to when the operation does not use the operating mode, can guarantee that the refrigerant flows rationally and steadily, and the solenoid valve can cooperate different circuits to realize anticipated control, and the precision and the flexibility of control can both be guaranteed, can satisfy user's diversified user demand, reinforcing user operation experience.

As shown in fig. 4, alternatively, the first pipeline 100 and the second pipeline 200 are connected to the third pipeline 600, wherein a first connection point is formed at a position where the first pipeline 100 is connected to the third pipeline 600, a second connection point is formed at a position where the second pipeline 200 is connected to the third pipeline 600, and the second valve 601 is located between the first connection point and the second connection point. In this way, under the condition of the operation refrigeration mode, the pipeline between the first connection point and the second connection point of the third pipeline 600 can be in a blocking state, the condition that the heat exchange is affected due to the fact that the refrigerant flows in the direction of the second flow divider 401 is avoided, the rationality and the stability of a refrigerant flow path are ensured, the heat exchange process can be orderly carried out, and under the condition of the operation heating mode, the third pipeline 600 is in a conducting state, so that the refrigerant can flow in the two directions of the first flow divider 301 and the second flow divider 401 after entering, the flow direction of the refrigerant is changed, the flow direction of the refrigerant is opposite to the flow direction of air, the utilization rate of the heat exchanger is higher, the energy efficiency of the heat exchanger is improved, the heat exchange quantity is obviously improved, and the optimal utilization of the heat exchanger is realized.

In other embodiments, the second valve 601 is optionally one inlet and outlet of a second three-way valve, one of the other two inlets and outlets of the second three-way valve is connected to the second pipeline 200, and the other is connected to the second splitter 401. In this way, the second pipeline 200 can be connected with the third pipeline 600 through the second three-way valve, so that the installation structure and form between the pipelines are simpler, the space occupation is reduced while the installation is convenient, and the cost is reduced.

Optionally, the first heat exchange tube group 300 is communicated with the first splitter 301 through a first branch tube 302, the second heat exchange tube group 400 is communicated with the second splitter 401 through a second branch tube 402, and the first branch tube 302 and the second branch tube 402 are provided with a plurality of first branch tubes 302 and a plurality of second branch tubes 402 which are provided with a liquid inlet tube and a liquid outlet tube, the liquid inlet tube and the liquid outlet tube of the first branch tube 302 are connected at two ends of the first heat exchange tube group 300, and the liquid inlet tube and the liquid outlet tube of the second branch tube 402 are connected at two ends of the second heat exchange tube group 400. Like this, through setting up a plurality of first branch pipes 302 and the second branch pipe 402 that have feed liquor pipe and drain pipe, not only can increase heat transfer area and heat exchange volume, better performance reverse cross flow's heat transfer effect can make the branching that the refrigerant flows through more moreover, makes the refrigerant pass through the heat exchange nest of tubes in different forms, and the refrigerant circulation has the variety, can avoid the pressure loss problem that leads to because of the flow path overlength, improves refrigeration plant's heat exchange efficiency under the different operating modes of refrigeration or heating to and satisfy the user demand under different operating modes.

Alternatively, the plurality of first legs 302 and the plurality of second legs 402 are of the same structural and dimensional design. Therefore, the refrigerant distributed to the pipeline can be more uniform, the refrigerant can flow in the heat exchanger more uniformly, and the unstable condition of the pressure and the flow rate of the refrigerant caused by the structural change of the pipeline is avoided.

Optionally, the number of first branch pipes 302 is greater than the number of second branch pipes 402. In this way, since the evaporator needs more branch pipes than the condenser in normal cases, the number of the first branch pipes 302 is larger than the number of the second branch pipes 402, so that the refrigerant distributed to the pipes is more uniform, and the heat exchange efficiency is ensured.

Optionally, the number of the first branch pipes 302 is N, the number of the second branch pipes 402 is n+1, preferably, four first branch pipes 302, three second branch pipes 402, or five first branch pipes 302 and four second branch pipes 402 are provided. Like this, make the setting quantity of first branch pipe 302 and second branch pipe 402 more rationalized, both can make the branching way that the refrigerant flows through more, avoided the flow path overlength to lead to the pressure loss problem, improve the heat exchange efficiency of heat exchanger, guarantee refrigeration and heating effect, can make the distribution of refrigerant more even again, guarantee the stability of heat transfer process.

Alternatively, the confluence piping 500 includes a first confluence pipe 501 and a second confluence pipe 502, one end of the first confluence pipe 501 is connected to the first heat exchange tube group 300, and the other end is connected to the fourth piping 700; the second header 502 has one end connected to the first header 501 and the other end connected to the second heat exchange tube group 400. In this way, during the operation refrigeration condition, the refrigerant passing through the first heat exchange tube set 300 will all enter the first collecting pipe 501, and the refrigerant in the first collecting pipe 501 all enters the second collecting pipe 502, and is divided into a plurality of flow paths by the second collecting pipe 502 to flow to the second heat exchange tube set 400 for heat exchange; and during the operation heating working condition, the refrigerants passing through the heat exchange of the first heat exchange tube group 300 all enter the first collecting tube 501, and meanwhile, the refrigerants passing through the heat exchange of the second heat exchange tube group 400 all enter the second collecting tube 502, and then the refrigerants in the first collecting tube 501 and the second collecting tube 502 flow to the fourth pipeline 700 in a concentrated manner, so that the refrigerants can be collected together, the quantity of the refrigerants is ensured, the branches through which the refrigerants flow are more, the refrigerants can pass through the heat exchange tube groups in different forms, the refrigerant circulation is diversified, the stability of the refrigerant flow is ensured, the heat exchange efficiency of the heat exchanger under different working conditions of refrigeration or heating is improved, and the optimal utilization of the heat exchanger is realized.

Optionally, one end of the second collecting pipe 502 is connected to the first collecting pipe 501 through a connecting pipe 503, and the connecting pipe 503 includes a first main pipe 504, a second main pipe 505, a first branch pipe 506 and a second branch pipe 507, one end of the first main pipe 504 is connected to the first collecting pipe 501, one end of the second main pipe 505 is connected to the second collecting pipe 502, the other end of the first main pipe 504 is connected to one ends of the first branch pipe 506 and the second branch pipe 507 through a three-way valve, and the other ends of the first branch pipe 506 and the second branch pipe 507 are connected to the other end of the second main pipe 505, wherein a one-way valve is disposed on the first branch pipe 506, and the one-way valve is configured to be conducted from the second main pipe 505 to the direction of the first main pipe 504. In this way, since the flow paths of the refrigerants are different during the operation of cooling and heating, the connection pipeline 503 is provided, so that the flow direction of the refrigerants can be adjusted in different operation modes, and the heat exchange process can be reasonably and orderly performed during the operation of cooling or heating working conditions, wherein during the operation of heating, the multi-path refrigerants synchronously flow to the first collecting pipe 501 and the second collecting pipe 502, so that the flow direction of the refrigerants in the first collecting pipe 501 can be prevented from flowing reversely, the three-way valve and the one-way valve can be used for controlling the flow direction of the refrigerants, so that the refrigerants always flow to the first collecting pipe 501 from the second collecting pipe 502, and the stability of the refrigerant flow is ensured.

It should be noted that, since there are a plurality of pipelines connected to the first manifold 501, a corresponding number of connection ports may be provided on the first manifold 501 according to the number of connection pipelines 503, so that the arrangement of the pipelines is more reasonable and tidy, which is conducive to better utilization of the installation space, and similarly, the second manifold 502 may also be connected to the pipelines according to the above manner, and the specific connection manner and structure are the prior art and are not described herein.

As shown in fig. 5, optionally, the heat exchanger further includes: a controller assembly 800. The controller assembly 800 is connected to the first valve 102, the second valve 601 and the third valve 701, and is used for controlling the on-off of the first valve 102, the second valve 601 and the third valve 701. Like this, make the mode of controlling first valve 102, second valve 601 and third valve 701 more have the intellectuality, the break-make of the first valve 102 of user control more of being convenient for, second valve 601 and third valve 701, the flow path of adjustment refrigerant, operation regulation and control is convenient and fast more, promotes the convenience of operation, and promotes user's use experience.

Alternatively, the first valve 102, the second valve 601 and the third valve 701 are each independently controlled. Therefore, the control accuracy and reliability are improved, the on-off of each valve can be independently controlled when the refrigerating and heating working conditions are operated, the refrigerant forms a flow path opposite to the air flowing direction, and the heat exchange efficiency of the heat exchanger is improved.

As shown in connection with fig. 6, an embodiment of the present disclosure provides an air conditioner including a heat exchanger as described in any one of the above.

In the air conditioner provided by the embodiment of the present disclosure, during the heat exchange, the installation position of the fan and the installation position of the heat exchanger are fixed, so that the air outlet form of the fan is directional air outlet, and the flow path of the heat exchanger is reversed during the switching of the cooling and heating working conditions, so that in the cooling or heating stage, one working condition of the conventional heat exchanger is necessarily in a downstream cross flow, that is, the flow direction of the internal refrigerant is the same as the flow direction of the air flow, while in the operation refrigeration working condition, the embodiment can control the first valve 102 to be conducted, and control the second valve 601 and the third valve 701 to block, so that the refrigerant entering from the first refrigerant inlet and outlet 101 sequentially flows through the first heat exchange group 300 and the second heat exchange group 400 for heat exchange, and then sequentially flows through the third pipeline 600 and the second pipeline 200 to the second refrigerant inlet 201 after heat exchange, and most of the flow paths of the refrigerant form a reverse cross flow with the flow direction of the air; during the operation of heating, the refrigerant enters from the second refrigerant inlet and outlet 201 and flows into the third pipeline 600 through the second pipeline 200, then the refrigerant is divided into multiple paths to synchronously flow to the first heat exchange group 300 and the second heat exchange group 400 for heat exchange, the heat exchanged refrigerant intensively flows into the converging pipeline 500 and flows to the first refrigerant inlet and outlet 101 through the fourth pipeline 700 to finish heat exchange, and at the moment, the flow direction of the refrigerant is opposite to the flow direction of the air, and the reverse cross flow is formed, so that the refrigerant flow can be optimized through the cooperation of the fourth pipeline 700 and a plurality of valves, the reverse cross flow can be formed under the refrigeration and heating working conditions, the utilization rate of the heat exchanger is improved, the energy efficiency of the heat exchanger is improved, the heat exchange quantity is obviously improved, and the optimal utilization of the heat exchanger is realized.

Optionally, the air conditioner further comprises: a blower 900. The blower 900 is disposed at one side of the heat exchanger, and the blower 900 is configured to discharge air toward the heat exchanger. Wherein, the liquid inlet of the first heat exchange tube group 300 is positioned at one side far away from the fan 900, and the liquid outlet of the first heat exchange tube group 300 is positioned at one side near to the fan 900. Therefore, the air flow direction and the refrigerant flow direction can form reverse cross flow, namely the flow directions of the air flow direction and the refrigerant flow direction are opposite, so that the heat transfer mode is reverse heat transfer during heat exchange, the heat exchange efficiency is effectively improved, the heat exchange quantity is further improved, and the purposes of energy conservation and support reduction are achieved.

Alternatively, the heat exchanger arrangement direction is perpendicular to the wind direction of the blower 900. In this way, by arranging the heat exchanger arrangement direction and the wind direction of the fan 900 to be perpendicular to each other, the generation of accident flow and uneven heat exchange can be avoided, and the stability and the high efficiency of the heat exchange process are ensured.

The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may include structural and other modifications. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others. The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. The utility model provides a heat exchanger, includes first refrigerant import and export (101) and second refrigerant import and export (201), and first refrigerant import and export (101) are connected with first pipeline (100), and second refrigerant import and export (201) are connected with second pipeline (200), its characterized in that still includes:

a first heat exchange tube group (300), one end of which is connected with the first pipeline (100) through a first shunt (301), and a first valve (102) is arranged on the first pipeline (100);

One end of the second heat exchange tube group (400) is connected with the other end of the first heat exchange tube group (300) through a converging pipeline (500), and the other end of the second heat exchange tube group (400) is connected with the second pipeline (200) through a second flow divider (401);

a third pipeline (600) which is communicated with the first shunt (301) and the second shunt (401), and a second valve (601) is arranged on the third pipeline (600);

And one end of the fourth pipeline (700) is connected with the converging pipeline (500), the other end of the fourth pipeline is connected with the first refrigerant inlet and outlet (101), and a third valve (701) is arranged on the fourth pipeline.

2. The heat exchanger according to claim 1, wherein in case of a cooling mode of operation, the first valve (102) is in a conducting state, and the second valve (601) and the third valve (701) are both in a blocking state; in the case of operating the heating mode, both the second valve (601) and the third valve (701) are in the conducting state, and the first valve (102) is in the blocking state.

3. The heat exchanger according to claim 1, wherein the first valve (102), the second valve (601) and the third valve (701) are each one-way valves or solenoid valves.

4. The heat exchanger according to claim 1, wherein the first (100) and second (200) lines are each connected to the third line (600), wherein a first connection point is formed at a location where the first line (100) is connected to the third line (600), wherein a second connection point is formed at a location where the second line (200) is connected to the third line (600), and wherein the second valve (601) is located between the first connection point and the second connection point.

5. The heat exchanger according to claim 1, wherein the first heat exchange tube group (300) is communicated with the first splitter (301) through a first branch tube (302), the second heat exchange tube group (400) is communicated with the second splitter (401) through a second branch tube (402), and the first branch tube (302) and the second branch tube (402) are provided with a plurality, wherein the first branch tube (302) and the second branch tube (402) are provided with a liquid inlet tube and a liquid outlet tube, the liquid inlet tube and the liquid outlet tube of the first branch tube (302) are connected at two ends of the first heat exchange tube group (300), and the liquid inlet tube and the liquid outlet tube of the second branch tube (402) are connected at two ends of the second heat exchange tube group (400).

6. The heat exchanger according to claim 5, wherein the number of first branch pipes (302) is greater than the number of second branch pipes (402).

7. The heat exchanger according to any one of claims 1 to 6, wherein the confluence piping (500) includes a first confluence pipe (501) and a second confluence pipe (502), one end of the first confluence pipe (501) is connected to the first heat exchange tube group (300), and the other end is connected to the fourth piping (700); one end of the second header pipe (502) is connected to the first header pipe (501), and the other end is connected to the second heat exchange tube group (400).

8. The heat exchanger according to claim 7, wherein one end of the second manifold (502) is connected to the first manifold (501) through a connecting pipe (503), and the connecting pipe (503) includes a first main flow pipe (504), a second main flow pipe (505), a first branch pipe (506) and a second branch pipe (507), one end of the first main flow pipe (504) is connected to the first manifold (501), one end of the second main flow pipe (505) is connected to the second manifold (502), the other end of the first main flow pipe (504) is connected to one ends of the first branch pipe (506) and the second branch pipe (507) through a three-way valve, and the other ends of the first branch pipe (506) and the second branch pipe (507) are connected to the other end of the second main flow pipe (505), wherein a one-way valve is provided on the first branch pipe (506), and the one-way valve is configured to be conducted from the second main flow pipe (505) in the direction of the first main flow pipe (504).

9. The heat exchanger according to any one of claims 1 to 6, further comprising:

and the controller assembly (800) is connected with the first valve (102), the second valve (601) and the third valve (701) and is used for controlling the on-off of the first valve (102), the second valve (601) and the third valve (701).

10. An air conditioner comprising the heat exchanger according to any one of claims 1 to 9.